I'll be honest, I was a little skeptical about these at first but I heard so many great reviews about it, I decided to give it a try. I haven't had good experiences with melatonin in the sense that yes, they help me sleep but I wake up very groggy in the morning. There was a noticeable difference when I woke up the morning after taking these. I've really been trying to improve my sleep quality/recovery which is another reason I decided to try these sleep capsules & I must say that when I woke up the next morning, not only did I feel well rested and refreshed, but there was no grogginess at all & I was able to sleep through an entire night, uninterrupted. Amazing stuff!